Crib.



H. NEUMAN.

C RI 8.

(Application filed Mar. 24, 1902.)

N0. 710,115. Paten ted Sept. 30, I902.

(No Model.)

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UNITE STATES PATENT Fries.

CRIB.

SPECIFICATION forming part of Letters Patent No. 710,115, dated September 30, 1902.

Application filed March 24. 1902. Serial No. 99,689- (No model.)

will enable others skilled in the art to which it appertains to make and use the same, referenoe being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in cribs to be used in sinking shafts in quicksand and other strata. -It has for its object a construction which shall be simple and economical and durable and efficient in use.

Improved details in the construction and arrangement of the several parts of my invention will be apparent from the detailed description hereinafter when read in connection with the accompanying drawings, forming part hereof, and the appended claims.

The invention embodies the idea of forming a crib with outstanding ledges, the upper faces of which are horizontal, or substantially so, and the lower faces or sides of which are inclined or beveled, so that the ledges will offer resistance to the lifting or forcing out of the crib by upward pressure and at thesame time permit its sinking in quicksand with greater facility and ease than would otherwise be the case by entering the sand at an angle and pushing the same laterally.

In the drawings, Figure 1 is a perspective view. Fig. 2 is a cross-section.

Referring to the drawings, 4 designates the base of my improved crib, comprising side timbers 5 and end timbers 6. A metal lining7 projects below the side and end timbers, its object being to cut into the sand and clear the way for the crib. The base is braced by cross-beams 5 and 5 The walls of the crib are indicated at 8, the timbers 9, forming the same, being joined at the corners in any. suitable manner and braced by crossbeams 10. The outer ends of each of the timbers 9 are beveled, as indicated at 11, forming a ledge 12 on the next timber below. The same construction is followed on each side of the crib.

Having thus described my invention, what is claimed as new, and desired to be secured by Letters Patent, is-

1. A crib having outstanding upwardlypresented ledges on its outer walls, substantially as shown and described.

2. A crib comprising superposed frames having upwardly-presented horizontal ledges on the outside edges thereof, substantially as shown and described.

3. A crib comprising a series of superposed horizontal beams, the upper surface of each beam being of greater width than the lower surface of the adjoining upper beam, forming earth-engaging ledges 011 the outside of the crib.

4:. A crib having outstanding upwardlypresented ledges on its outer walls, and a cutting edge at its base, substantially as shown and described.

In testimony whereof I aifix my signature in presence of two witnesses.

HERMAN NEUMAN.

Witnesses:

GEORGE TODD, PROOTOR E. HENWOOD. 

